Single-trigger mechanism for double-barrel guns



C. W. LINDSAY. SINGLE TRIGGER MECHANISM FOR'DOUBLE BARREL GUNS.

APPLICATION FILED JULY I, 1919.- I Patented Apr. 26, 1921.

FIG; 1

UNITEQ STATES CHARLES W. LINDSAY, OF HOUSTON, TEXAS.

SIllTG-LE-TRIGGER MECHANISM FOR DOUBLE-BARREL GUNS.

Application filed July 1, 1919. Serial No. 307,996.

To all whom it may concern Be it known that I, CHARLES W. LIND- SAY, a citizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Single-Trigger Mechanism for Double-Barrel Guns, of which the following is a specification.

The object of the invention is to provide a single-trigger mechanism whereby both barrels of double-barrel guns may be fired successively and in the order desired.

A further feature resides in the provision of the means for preventing a premature discharge of the second barrel, due to the rebound of the gun succeeding the recoil afterthe firing of the first barrel.-

It is also the object of the invention to provide a single-trigger mechanism which is constructed with a minimum number of parts so that it may be easily and cheaply constructed and easily applied to the firing mechanism of the ordinary double bar-.

rel gun. 7

With'the above and other objects in view,

; the invention has particular relation to certain novel features of construction, operat1on and arrangement of parts, an example of which is given in this specification and illustration in the accompanying drawings 7 wherein: I i

Figure 1 is a side View of a double barrel gun with the rear stock removed and with members in position to fire first barrel.

Fig. 2 is a perspective view of the sear actuating means, shown in position for firing'rthe first barrel.

ig. 3 is a perspective view of said means shown in position after firing both barrels. Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of'the fi res, the numeral 1 designates the frame 0 the usual doubled barrel gun, in the sides of which are pivoted the hammer controlling sears 5, 5 provided at their rear end with corresponding inwardly turned projections 20, 20, throudgh which the scars are actuated and release from the'corresponding hammers a, 4, to cause the firing of the respective barrels. The frame of the gun extends rearwardly, formingthe upper and under plates 2.and 3, to which the gun stock is secured, the latter of said plates also supporting the trigger mechanism; The numeral 10 designates the trigger, whose forward end is pivoted to the block This trigger plays through an alined slot Specification of Letters Patent. Patented A 26 1921 Y in the lower plate 3, the downwardly prov I raising plat e 8 and this part of the trigger is extended rearwardly forming a-hook like projection 15 which operates in the curved recess of a crescent shaped detent 7 The lower arm of this detent is pivoted in the 7 lower plate 3 at the point 19, whereby it may rock back and forth, and it is controlled partly by a V-shaped cam 21, which presses on a pin-14, projecting laterally from the detent, when not'operated by the projection 15 or; the momentum block 6, as will be hereinafter explained.

Fig. 1 shows all members in position to The crescent shaped fire the left barrel. detent 7 is tilted forward resting on the forward portion of the projection 15 and the cam 21 is back of the pin 14, holding it firmly in its most forward position,

barrel has been fired. The crescent shaped the front part of projection 15, which isi'ntegral with the trigger plate 8 and trigger 10, and is locked against the turned up end r Fig. 2 shows the members after the left or shoulder 15 of projection 15, arresting the further rise of sear plate 8 before coming into contact with the right sear 5. Selective plate 9 is between the lower plate 8, and

the inwardly turned end 20 of the left sear 5, and is thick enough only to cause the same to fire. the first barrel when the trigger is pulled. The firing of the first barrel causes '95 erators finger-from the trigger 10, permitthe gun to violently recoil releasing the opting all of the trigger members to move downward, at the same tlme turning momentum block 6 on its axis 19 ahead, causing the pin 13, extending laterally from momentum block 6,to strike the detent 7 and drive it forwardly to the same position shown before the left sear 5 was operated. Upon the; rebound of the gun from the operators shoule der the trigger 10 will come in contact with the operators finger and will be involuntarily pulled, raising trigger plate 8, tilting the crescent shaped detent 7 back over the pro-- jection 15 and against the turned up end 15', which will arrest further rise of the projection 15, as shown in Fig. 2, thus preventing the involuntary firing of the second has, been loaded'and' the barrels closed as.

barrel. Upon release of the operators finger from trigger 10, the cam 21, pressing back against pin 14, causes the crescent shaped detent to tilt back, freeing projection 15. The operator now may, by pulling the trigger 10, release the right sear 5 as shown by Fig. 3, firing the second barrel which would complete the routine of the firing of both barrels. Upon reloading the gun the hammers 4, 4 will be cooked, sears 5, 5 will engage notches 22, 22 in the hammers 1, 4

jection 20 of right or left sear, as desired,

thus providing for the firing of either barrel first.

The operation of the mechanism :thus described is as follows: Assuming that the gun indicated in Fig. 1 the first barrel may be fired, either the right or the left, as the'case may be, accordingto the adjustmentof-the selective plate 9. 1 If the parts he in the position shownin Figs. 1 and 2, with the selective plate placed under the. left sear the left hand barrel will be first discharged- A pull upon the trigger to discharge the left hand barrel will move the parts into the position shown in Fig. 2. shaped detent 7 will be moved back over the detent actuating cam 15, engaging the shoulder 15 and the trigger 10 will have raised enough to have fired the left barrel and alsowill be locked against further movement of the trigger parts until the recoil has bounded the gun back, whereupon the operators. finger Wlll release its pressure agamst'the trigger 10, causing the trigger parts with the projection 15 to release the detent 7. The momentum block 6, which is actuated by the recoil of the gun drives detent 7 to its forward position and upon the rebound of the gun from the operators shoulder will cause the operator to involuntarily pull the trigger 10, raising trigger plate and proj ecti-on 15, thus forcing back detent 7 against projection shoulder 15 and the trigger plate 8is thus prevented from coming into contact with the right hand sear 5. Now that the operator has been prevented from involun tarily firing the second barrel, he may at will release trigger 10, allowing the trigger parts to move downwardly which will .re

lease detent 7 to the spring cam 21, which will press back the pin 14 and carry the crescent shaped detent 7 out of the path of The crescent .mers 4, 4 will be cooked, sears 5, 5 will engage the notches 22, 22, by the pressure of the springs 18, 18. At the same time, the sear ends 20, 20, will be forced down. One of the sear ends 20 will come into contact with selective plate 9 as shown in Fig. 1, forcing trigger members down, causing the under surface of projection 15 to come into contact with the lower arm of detent 7 and tip the detent aheadon its'aXis 19. Cam

21, will now be raised over the pin 14', and will rest in the position shown in Fig. l. The momentum block 6 is tilted back on its axis 19 and rests there from its own weight without the aid of springs and is free to move ahead upon the recoil of the gun. Owing to the feeble recoil of a heavy gun firing a light load a safety block is'liable to fail to block the trigger parts to prevent a double discharge of the gun, momentum block 6 is pivoted into the frame 3 where it will receive the greatest shock" from the direct recoil of the gun and from its free pivot 19. Momentum block 6 is of special design in that it stands up and will deliver a greater hammer blow than by any otherknown design and is free from any spring orsprings. The selective plate 9 is of the staggered type, with two arms, one for the left sear, and one for the right, and one operates its sear while the other misses its sear. The left orright barrel may be fired first by moving'the selective plate 9 ahead or back to registerwith the left or right sear projection 20 respectivelv.

While the invention has been illustrated in conjunction with a usual and well known type of breech loaded gun it is of course manifest'that it may be employed with any double-barrel fire-arm.

'VVhat I claim is: r

l. A single trigger mechanism of" the character described including hammer controlling sears, a trigger'formed intoa common sear actuating means a pivoted crescent shaped detent' arranged tobe actuated by the trigger and locking the'trigger after releasing one ofthe sears from its'hammer, a detent lockingmechanism automatically disengaging upon release of the trigger to permit the further movement of the trigger whereby the common sear-actuating means is brought into engagement with, and actuates, the other sear. V I

- 2. A single trigger mechanism of the character described including hammer controlling sears, a trigger formed into a common sear actuating means, a detent actuating means having a detent actuating cam, a stop shoulder, a crescent shape detent pivoted at its lower portion and suitably shaped to arrest and release said detent actuating cam, a controlling spring formed with a cam arranged to press downwardly on a pin projecting from the crescent shaped detent, for pressing the crescent shaped detent ahead or back depending on the position of the detent with relation to the detent actuating cam, a curved projection of the crescent shaped detent extending under the trigger end for setting the crescent shaped detent in its forward position upon loading the gun.

3. single trigger mechanism of character described including hammer controlling sears, a trigger formed into a common sear actuating means, an arcuate detent, a sear actuating means shaped to force back the said detent far enough on its axis to actuate the first sear, a trigger end extending into the recess of said detent for tilting the detent back and forth on its axis, a controlling spring to tilt back the detent on its axis out of the path of the trigger end after the operating means has released the first sear, whereby the common sear-actuating means is brought into engagement with, and actuates the other sear.

4L. A single trigger mechanism for doublebarrel guns including hammer controlling sears, the trigger formed into common sear actuating means, an arcuate detent member, arranged to be brought into locked position by the trigger actuating means when the corresponding hammer is cocked into position, a springless pivoted momentum block for driving ahead the detent, upon the recoil from firing the gun, and locking the intermediate pull, and locking the trigger from releasing the other sears, a locking member automatically disengaging itself upon release of the trigger to permit the further movement of the trigger after the recoil and involuntary pull, whereby the common searactuating means is brought into engagement with, and actuate the other sear.

In testimony whereof I signed my name to this specification.

CHARLES w. LINDSAY. 

